Cobposatji



w. E. WILLIAMS MACHINE FOR COPYING BY THE HECTOGRAPH PRINCIPLE Filed March 25, 1925 5 Sheets-Sheet 1 lad/W655:

May 1, 1928.

W. E. WILLIAMS MACHINE FOR COPYING B' Y THE HECTOGRAPH PRINCIPLE 5 mats-sheet Filed March 25. 1925 wli May 1, 1928.

W. E. WILLIAMS MACHINE FOR COPYING BY THE HECTOGRAPH PRINCIPLE Filed March 25, 1925 5 Sheets-Sheet 3 w. E. WILLIAMS May 1, 1928. 1,667,917 7 MACHINE FOR COPYING BY THE HECTOGRAPH PRINCIPLE v Filed March 25, 1925 5 Sheets-Sheet 4 May 1, 1928. 1,667,917

v w E. WILLIAMS momma FOR COPYING BY THE HECTOGRAPH PRINCIPLE Filed March 25, 1925 5 Sheets-Sheet 5 Patented l,

WiLLIAll-I EBASTU'S VHTLLIAB/ES, CGRPOBATED. F CZIICAGG,

or wrmanrrn, rumors, AssIsnoR T0 macro, IN- nrmnaors. A conronnrron or wns'r VIRGINIA.

TvIACI-IINE FOE CC'FYING BY 'lfil'l HECTOGBAFH PRINCIPLE.

- Application filed March 25, 1925.

lily invei'ition relates to a machine that is used with a gelatin sheetor strip that is stretched across a bed and secured at each end onto spindles supported in the machine and means are provided for winding and unwinding the spindles and presenting a new surface on the gelatin sheet to the platen surface of the exposed gelatin sheet. and mechanism is provided for ap 'plying paper or cardboard to the gelatin sheeton the bed fortakingimpressions on the hectograph principle. the gelatin sheet itself being, as it were. the type bed. as is well known in this art. 7 The object of the invention is to produce a construction to enable an accurate register each time for the copy to be made with the imprint that is made on the gelatin roll sheet from the master copy as is well understood in hectograph work.

A further object of the inveutionis to provide .a means oflaving down the sheets onto the gelatin roll inaccurate and exact registr and shape throughout, the entire length of the copying surface or plat-en surface.

A further object of the invention is to provide a. construction for registering the 'master copy and the copies to be taken therefrom at an desired point of i tration on the bed or printing surface. 'i igfurther object the invention to provide a mechanism thatwill withdraw the paper sheets completely free from the gelaroll as sheets are desired to be removed from the machine. 4 special and detail objects will be hereinafter set forth,-

Reference will be had to the accom an ing drawings in which Fig. 1 plan view of the machine. l

FigfQ is a side vation of the machine looking from the direction of the, arrow a in Fig. 1. being what is termed the right side of he machine. theoperator always beat the left of both Figs. 1 and Fig. 3 is a detail of the fastening of one of thla side rack.-: eing a cross sectional section of one corner of the bed and frame.

Fig. lis a sectional detail of one ofthe FifllpS for the carriage. I L Fig. 5 a side elevation being the left side of the machine or the pposite side from "that shown in Fig. 2.

Fig. 6 is a plan sectionalxletail showing Serial N0. 18,326.

the clamping roll and paper stops on line 6-6 of Fig. 9.

Fi 7 is an elevationaldetail looking from the left of Fig. 9 showing the means of supporting the paper stop fingers. I

Fig. 8 is a front elevation of the machine.

Fig. 9 is a trans 'erse sectional elevation through the impression carriage on line 99 of Fig. l. 7

Fig. 10 is a. detail front elevational view on an enlarged scale of the operating lever and its links.

Fig. 11 is av transverse sectional view on line 11,11 of Fig. 1.

Fig. 12 is a detail in connection with the operating levers. t

Fig. 13 shows one of the spindles upon which the gelatin rolls are mounted.

he machine is provided with a sort of a box-like sheet steel frame body indicated by 1 having foot flanges 2 on the sides thereof.

Onto the right side of this boxframe 1 there is provided a longitudinal supporting bar 3 which extends beyond the box frame at each end and has its ends turned over into the angle projections t from. which there extend upwards the posts 5, see Figs. 1 and 2.

Into the posts 5 there is mounted on trunnion ends 6' a rack bar 7 having rack teeth 8 on its underside. This rack bar 7 supports and guides the impression carriage for applying the paper to the gelatin roll sheet.

On the left side of the box frame of the machine, see Figs. 1 and 5, there is fixed a bar 9 of similar character to that of the bar 3 but not so long. y

In the ends of thebars 3 and 9 I pro vide the bearings for carrying the spindles upon which the gelatin sheet is rolled. One of these spindles is shown in Fig. 13, as having a wooden body 10 into which iron gudgeons are secured by rivets 11, the gud eons being provided with flat portions 12 with round small trunnion ends 13, to hold the spindles central with the axis of rotation of the revolving means of the machine.

llliounted in the side bar 3 at the right I provide small blocks .14 having small perforations 15 adapted to support the trunnion ends 13 of the spindles.

.' he blocks 1% are secured to spring plates 16 secured by rivets or screws 17 to the side bar 3.

TVhen the spindles are inserted in the ma chine the trunnion ends 13 of the gudgeons of the spindles are inserted in. the holes 15 and pressure is applied to push the springs 16 outward to permit the entry of the other gudgeon end into a short supporting spindle shaft 18, see Fig. 8, at the front end of the machine and into a .'or1esponding shaft slightly different in form indicated by 1 9, at the rear of the machine, both-on the left side'of the machine, see Figs. 1 andv 5.

The shafts 18 and 19 are slotted in their ends to engage .the flat portions 12 of the spindle gudgeons and engage, as it were, the roll spindles to be revolved with the shafts 18 and 19 or remain stationary whenever the latter are locked in fixed position as desired.

A gelatin sheet is shown in the machine in Figs. 1, 2, '5, 8 and 9 extending from the body of the roll at the outward end asVindicaited by 21, and (N1 the inward, side as indicated. by 20 and the part of the sheet shown over the bed of t-hc'machineas and the bed is indicated by 90.

A hand wheel 23 having a hand crank 24 is provided to rot-ate the shaft 18 and wind the gelatin sheet onto the spindle at the front end of themachine.

The shaft 18 is mounted inside of a housing 25, see Figs. 1, 5 and 8 at the left front of the machine on the end of the said bar '9 and has mounted thereon a little spur gear 26 which is engaged by a larger gear 27 on a secondary shaft .28 1113011 which the said "hand wheel 23 is mounted and thus the hand wheel 23 drives the shaft 19 together with the spindle mounted therein.

A pawl 29 is hinged on a pin 30 and engages the teeth of the gear 28 and prevents a backward rotation of the gear and the front spindle when desired. This pawl 29 has a weighted .end 31 which holds it normally in engagement with the teeth of the gear 27 and into this end there is fixed a latch lever which has its end 33 extending outside of the frame 1 of "the machine in easy reach of the operator who, when desired, may lift the end 33a11d thus disengage the pawl 29 from the teeth of the gear .27. v

- The end 33 of the latch lever 32 extends through an aperture in the side of the box frame. This aperture is provided with a shoulder notch 34, see Fig. 5, which permits desired.

turn is controlled in its movement in one direction by means of a pawl 37 hinged on a pin 38 in the side of the machine. p

A spring 39 normally holds the pawl 37 in engagement with the teeth of the gear 36. The end of the pawl 37 extends toward the front of the machine and is connected by a hinge 40 with a link 41 to a handle 42 which extends outside of the frame in easy reach of the operator as may be seen by Fig. 1.

The shaft 43 of this handle 42 extends through an aperture in the side of the frame which has a retaining shoulder 44 which perinits the operator to hold free of engagement the pawl 3.7 from the teeth of the gear wheel 36 as illustrated in Fig. 5.

A hand crank 45 with its handle 46 permit s the operator to use the shaft 19 to :rewind the roll onto the outer spindle However, in the use of this machine the general practice is to put the loaded-spindle onto the outer end of the machine into the end of the shaft 19 and into rear block 14,

again rewound on the spindle at the front of the machine.

As before .mentioned, the impression carriage'is carried on the rack bar 7 in 'a man- 'ner that the impression carriage may be shoved backward and forward :along this rack bar 7 and over the bed of the machine as desired. 7

The impression carriage has as its essential feature the impression roller47 which is rubber faced and adapted to press down in contact with the gelatin sheet, the paper of the master copy and the paperof the copies desired to be made. This rubber faced roller 47 has co-actingwith it a clamping roller 48 and the latter is adapted to be swung to and from the roller 47 in. a. manner to clamp the paper tobc fedontot-he gelatin sheet and release the same as desired in the operation of: the machine.

The paper is directed into the embrace of the rubber roller 47 and the clamping roller 48 by means of the guide plate 49, see

Figs. 9 and 11, which guide plate is fixed in the frame of the impression carriage.

Mounted underneath the roller 48 and can ried by the same supporting arms which support the roller 48 with the frame of the impression carriage, there is a peculiarly shaped bar '50 which hangs, as it were, di-

rect-l-y underneath the ro1ler48.

when

. proper time when it is desired to release the This bar is provided with dove-tailed slots 51 best observed in Fig. 7, which serve as guides for the stop fingers 52- which are extensions of an angle plate 53 having the vertical flange 54 and this flange 54'is connected by studs 55 with the lever arms 56 which are mounted at 57 to vertical post pieces 58 condium of a cam movement shown in detail in F 1g. 12.

The stop fingers 52 abut against the rubber faced roller 47 and thus furnish a stop for the paper 122 when the same is inserted along the-paper guide plate 49. At the fingers 52 from the contact with theroller 47 and withdraw them for clearance for the paper to travel down between the rollers 47 and 48 after the roller 48 has clamped the paper to the roller 47, springs 61 mounted on studs 62 secured to the angle 54 of the plate 53 withdraw the plate 53 and its stop fingers 52 from the roller 47. The springs 61 act against-little brackets 63 secured to the impression frame carriage angle bar 59, see

Figs. 6 and 9.

- The impression carriage frame is composed of the cross angle bar 59 above menthe angle bar 59, see Fig. 1.

The inner .ends of this yoke piece 64 are turned around as indicated by 66 for the purpose of carrying the hinge pins 67 upon which is mounted a'bail member 68 in the formof a rectangle having a rear cross member 69, see Figs. 1, 9 and '11. p

The sole purpose of this bail member 68 is to actuate the roller 48 to and from the rubber faced roller 47 and this is brought about by means of hinge pins 70 hinged in the bail 68 and secured into angular or bell crank blocks 71 which are hinged at 72 into the aforementioned angle yoke piece 64.

In these bell crank blocks 71 the trunnions of the clamping roller 48 are journaled and from these trunnions the guide bar 50 is carried bysuitable bearings at the ends of the bar 50. i f v Thus theraising and lowering of the side of the bail 68 that is adjacent to the operating handle the roller 48 is moved toward and away from the roller 47 and clamping and releasing the paper between said rollers.

The roller 48 is held normally in contact with roller 47 by springs 7 6' working against the blocks 71 and the vertical leg of angle frame piece 59.

In order to better sustain the bell crank blocks 71 there is provided a double bearing for its hinge pin 72 in the form of keeper pieces 73 secured by rivets 74 to blocks 75 to the yoke piece 64, see Fig. 1.,

The block 75 at the left of Fig.1 extends downward and furnishes the bearing for the rubber faced roller 47 at the left end of the roller. see Figs. 1 and 5, while the block 75 at the right is simply a filler block, the bearing for theroller 47 at this point being made in the bar 77, see Figs. 9 and 11. i

The angle frame piece 59 which extends across the impression carriage is weldedto or made an integral part of the longitudinal bar 77 and the bail 64 is not only connected. to the angle frame piece 59 by the rivets 65, see Fig. 1. but is also connected directly to the bar 77 by means ofthe angle block 78v and'rivets 79, see Fig. 10.

To this bar 77 there is also welded or cast integrally therewith, if the frame is made of a casting, some keeper clevises 80 and 81; 80 being the front one and 81 the rear clevis.

These are simply U-shaped pieces which extend over and around the rack bar 7 outside of some clevis pieces 82 and 83 which are embraced by pieces 80 and 81 in a manner that they do not appear as separate pieces in the plan and side elevations, but are shown in end sections in Fig. 10.

The pieces 82 and 83' are clevises which embrace in a sliding fit the bar 7 and extend down and are fixed by welding to a longitudinal bar 84 and interposed between the bar 84 and the left leg of the clevises 82, see Fig. 10, there are blocks 85 which have outer end extensions 86 adapted to hold the impression carriage in a vertical position when the same is rocked around the trunnions of the bar 7, the outer extensions 86 coming against the sides of the frame when the impression carriage is rotated to a vertibar 7 with as little slack movement as will permit the free sliding backward and forward along the bar 7.

The clevis pieces SOand 81 embrace the clevis pieces 82 and 88 in a sliding tit, and at the left of Fig. 11 the clevis piece 81 and bar 77 are hinged to the clevis piece 83 and bar 84 by a hinge pin bolt 87. A similar boit 88 passes through the bar 77 and clevis pieces 80 and 82 and bar 84 at the front, the difference being that the hinge pin 87 is a regularhinge pin allowing only a hinging action while the bolt 88 is more of a clamping bolt since the hole through the clevis piece 82, block 85 and bar 84 is larger than the bolt 88 as indicated by the dotted lines 89, Fig. 10. This permits tion :to that of accommodating a thickness carry the bar 811 always travel in parallel relationship with the bar 7.

This slight adjustment is necessary in order to fit the roller 47 in proper contact with "the gelatin sheet 92 on the bed 90 of the .machine.

The screw 91 having a jam nut 92, see Fig. 10, regulates the amount of this adjustment in a downward direction while the limit of the excesssizc of the aperture 89 in the bar 8st and its connected parts over the size of the pin bolt 88 regulates the upward lift of the relationship of the inner end of the two :bars 77 and 8st.

The purpose of this adjustment in addiof paper on theigelatin roll portion 224m the bed 90 is to provide the means of the positive drive of the roll. 17 from the rack "teeth 8101f the bar 7 :through the medium of a gear wheel 93 which engages the teeth '8 of the rack bar 7 and is carried on a tITUIIIIlOH :pin 94 secured into the bar 8 1. see Fig. 2. The gear wheel 93 engages only a part of the width of the face of the rack teeth 8 "and :extends inward to cover over the face of the gear teeth. of the gear 95 upon the shaft of the roller 47.

Thus as the impression carriage is moved backward and forward along the bar 7 through the medium of the embrace of the elevis pieces 80, 81, 82 and R3 the gear 93 is made to rotate in one direction and it in turn rotates the gear-95 in another direction which causes the .roll 17 to revolve over the-bed 90 and gelatin sheet 22 of the machine in the same manner that the roll might revolve with its own freedom, the pitch diameter of the gears 93 and 95 being exactly the diameter of the roll 17, so that the amount of travel along the rack bar 7 is exactly equal to the amount of travel that the roll 417 makes in moving over the bed of the machine.

The movement of the f 'ame piece 7 t which carries the roller 47 about the pin 87 as a fitor the spring of the parts will vary the I provide on the outer end of the roll .517

a gear 96. see Figs. 1.. 5 and 8, of the exact diameter of the gears 93 and 95 and on this side of the machine there is provided a supplementary rack 97 secured .to the bed 90 of the machine by a projection 98 of the rack extending under the edge of the bed 90, see Fig. 3, and securcdthereto by flat head screws 99.

To provide an exact adjustment of the pitch line of the gear teeth of the rack 97 with the gear 96 I provide secondary screw blocks 100 seeured into the projection 98 of the rack 97 and abutting up against the underside of the bed 90..

Into these screw blocks 1100 :the screws 99 are set so that by the adjustment upward or downward of the blocks 100, the screws 99 may be-made to raise and. lower the rack 97 in relation to the bed "90 of the machine, thus to accommodate the riding of the roll 47 on the gelatin sheet 22 at the desired elevation. V

The raising and lowering of the hairs 60 and 68 in the operation of the machine is brought about by the operating handle 101 hinged at 102 to a block 103 secured to the bail frame piece 64 by the screws 104, see Fig. 10.

This operating handle 101 .is not only used to raise and lower the bail pieces as described, but used by the operator in moving backward and. forward the impression carriage over the bed and along'the bar 7.

In this respect to moving the carriage back and forth the operating handle 101 is simply a fixed member by which to move the car'- riage but in the raising and lowering of the handle about its hinged axis 102 brings about the movement of the bails upward and downward through the medium of the links 105 and 106; the foi'inerbeing hinged at 107 and the latter-at 108 to this operating handle. I

The link 105 is provided with a cam surface 109, see Fig. 10, which operates against the roll 110 on a .pm 1.11 in the bail 68 and the lower side of the cam end of the link 105 rests against av block 112 secured by screws 113 to the bail frame piece 64.

Thus in the movement of the handle 101 to the right or left in Fig. 10, the bail (38 is raised and lowered at the front edge which I on the raising releases the roller 48 from the roller 47 and on the lowering allows the springs 76 to push the tact with the roll 47.

As relates to the raising and lowering of the bail 60 at this front member by means of the link 106, this is brought about by a cam block 114, hinged at 115, see Figs. 10 and 12,

roller 48 in conto the aforementioned block 112 and carrying the roller 116 which operates, directly in contact with the bail member 60.

The end of the link 106 terminates in a hook 117 whichengages a tooth118 on the block 114 and as the link 106 is pulled to the right it oscillates the block 114. This end of the link 106 passes through a slot in a strip 119 secured by screws 120 in the block 114 as shown in Fig. 12. p

A pin 121 in the link 106 is adapted to engage the strip 119 on a movement to the left of the link 106 as the same moves free of the tooth 118 the function being that on the movement of the handle 101 from the position shown in Figs. 8 and 9 to the position of Fig. 10 the bail 60 is moved to bring the stop fingers 52 in contact with the roll 47 and simultaneously therewith and move the bail 68 to carry back the roll 48 free from the roll 47 in the position to receive the paper 122 which position is shown by Fig. 11.

Upon the entry of the paper 122 against the stop fingers 52 and in contact with the roll 47 the movement of the handle 101 to the left in Fig. 10 first causes the bail 68 to permit the springs 76 to move the roll 48 to contact with the roll 47, the cam surface 109 releasing the roll 110 of the bail 68 to allow .pleted by the Meantime the cam block 114 remains as it were, momentarily at rest while the end 117 of the link 106, see Fig. 12, moves to the left free of the tooth 118 the latter remaining stationary until the pin 121 on the link 106 comes in contact with the piece 119 which then moves the block 114 carrying its roller 116 to the left and the motion is comsprings 61 best seen in Figs. 6 and 9. V

The position of the roll 116, see Fig. 12, when the handle 101 is open as indicated in Fig. 10 is that of a stable position adapted to remain at rest until on return movement the pin 121 movesover to the left to engage the piece 119.. The purpose of this rest is to allow the, stop fingers 52 to hold the paper inserted in between the rollers 47 and 48 until such time as the roller 48 shall clamp the paper against the roller 47 and then there will take place a sudden release of the fingers 52 to be retraced by the springs 61 and make a quick withdrawal of the stop fingers 52 permitting. the carriage then tomove forward and feed the paper down between the rollers 47 and 48 onto the gelatin sheet 22 as the carriage is moved forward by the operator through the handle 101;

The cam block 114 is limited in the extremes of its movement by the pins 127 and 128 engaging a projection 129, Fig. 10, fixed to the block 112 thus the cam block 114v is rotated only through the segment between the pins 127 and 128.

On the completion of the printing operation on the Withdrawal of the carriage back to the place of commencement of the operation the moving of the handle 101 to the position of Fig. 10 from that of Fig. 8 which releases the paper for withdrawal slightly before the stop fingers 52 come in contact with the roll 47, the paper having been withdrawn at this time substantially to the same place as when originally inserted.

A side register or guide for the paper is provided in the form of an adjustable plate 123 having a side flange 124 secured inposition across the paper guide 49 by a clamping nut 125 which clamps a stiffening flange 126 of the paper guide 49, see Figs. 1, 2 and The impression carriage is limited in its movement along the bar 7 and over the bed of the machine by means of the stop block 130 at the rear of the machine and a similar block 131 at the front of the machine.

These stopblocks are alike save only they are reversed as to the position of their contact ends.

The purpose of these blocks is to register the movement of the impression carriage at both ends of its stroke in any position desired on the bed of the machine.

The detail construction of these stop blocks is best-understood from Figs. 2 and 4.

The block is composed of a clevis piece 132 which extends over and embraces the bar 7 and the wings of this clevis piece are separated by a filler block 133 connected across to the wings of the clevis piece 132 by the rivets 134 thus the clevis 132 with its block 133 becomes a sliding member on the bar 7 and is entered on the bar by sliding on from the end of the bar.

The clevis piece 132 has its side members extending downward and carrying a hinge pin 135 on which is hinged a pawl block 136 which block is provided with teeth 137 which engage the rack teeth 8 of the bar 7.

, The teeth 137 are held in engagement with the rack teeth by means of a spring 138 threaded onto a screw -139 screwed into the block 133 and thus normally the teeth 137 always hold the block stationary on the bar 7, until the teeth 137 are released.

For convenience of releasing and moving the blocks there is provided the contact Wings 140, one on each side'adapted to be pressed down by the fingers and thus release the teeth 137 from the teeth 8. These Wing pieces l4.-0are the ends of a U-shaped piece which embraces the outside from the bottom of the clevis indicated by 141 and extend across as shown by 1 12, Fig. L, and are secured by the screw 143 to the block 136.

Thus by pushing down on the two wings 140 or either one of them alone there is pushed down the block 136 with its teeth 137 around the hinge pin 135 compressing the spring 138 and thus allowing the block in total to be shoved backward and forward along the bar '7 as desired for any given ad justment of the movement of the impression carriage across the bed of the machine.

The applicant has disclosed novel features in this application which are also disclosed in his co-pending applications Ser. Nos. 26,77; 54,750; and 108,058; and. expressly reserves the right to claim any novelty not covered by the claims of this application as allowed in another co-pemling application.

\Vhat I claim is:

' 1. In a machine of the class described, an impression carriage provided with an impression roll adapted to press a sheet of paper in contact with a gelatinized surface as the roll is moved in relation to the said surface, a clamping roll also mounted in the said carriage and adapted to clamp paper to the said impression roll, a series of p fingers adapted to register in contact with the said impression roll and furnishing a registering end for paper that is fed to the impression roll and means for mov ng the said stop fingers to and from the said impression roll and for moving the said clamping roll to and from the said impress n roll by a transverse movement of a carriage operating handle.

2. In a machine of the class described, an impression roll mounted in a carriage and adapted to be moved over a gelatinized siirface, a clamping roll located in the front or the path of the travel of the said impression roll and adapted to be swung to and from the said impression roll in the form of clamping the paper, a stop for the paper abutting against the said impression roll and located underneath the said clamping roll and means for moving the said stop to and from the said impression roll, said means including a transversely movable carriage operating handle.

3. In a machine of the class described, a

bed, a gelatinized sheet upon the said bed, an impression roll adapted to hold a sheet of paper in contact with the said gelatinized sheet, a registering stop adapted to abut against the said impi'ession roll on the side thereof in which thepaper is applied by the operator a clamping means located above the said stop and adapted to clamp the paper to the said impression roll and means for moving the said stop to and from the said impression roll controlled by a transversely movable operating handle.

4. In a machine of the class described, an impression carriage provided with an iin pression roll adapted to be rolled over a gelatinized surface, a claii'iping roll adapted to hold paper to the said. impression roll, a stop for registering the paper in relation to a position on the impression roll just above the: gelatinizcd sheet and underneath the said clamping roll, a transversely movable operating handle, a cam movement controlled by transverse movements of said handle adapted to regulate the movement of the said step to and from the said impression roll in a manner that the clan'iping roll is released. from the impression roll the'stop made to engage the impression roll and remain there until the clamping roll again comes in contact with the impression roll, whereupon the stop is released thus'produciiig a register of the paper in relation to the travel of the impression roll onto the gelatinized sheet.

5. In a machine of the class described, an impression carriage adapted to carry and move an impression roll over a gelatinized surface and place in contact with and remove a sheet of paper-from the said gelatiiiized surface, a stop for registering the place ment of the paper in relation to a position on the said. impression roll, a clamping roll adapted to clamp the paper to the impres sion roll, means for moving the said stop to and troiii the said impression roll and means for moving the said clamping roll to and from the said impression roll and both of the said moving means connected to be operated by an operating handle'secui'ed to the vframe of the carriage and connected to be moved transversely for operating the said parts by cam movements, -v

6. In a iiiach'ine of the class described, a rack bar mounted Oll one side of the machine on end trunnions adapted to' be rotated thereon, an impression carriage connectet to slide along the said bar and be supported thereby in a movement in a rotary direction around the axis of the said rack bar,'gearing carried by the said impression carriage and adapted to engage the gear teeth of the said rack bar, and drive an impression roller can ried by the said impression carriage; in'coiii bination with a secondary rack bar on the other side of the machine and parallel with the said first mentioned rack bar and with a gear on the other end of thesaid impression roll adapted to engage the said secondary rackbar in a manner that both ends of the said impression roll will travel parallel and square with the surface to be imprinted by the machine as relates to the edges there 7. In a machine of'the class described, a-

rack mounted along the side of the machine,

' said impression roll.

an impression carriage mounted to engage the Said." rack 'in sliding arrangement, a gear mounted to] travel posltively in the true pitch association with the rack teeth of the said r ack, an impression roll carrier by the'said impression carriage and provided on the shaft of the said roll with a gear adapted to engage the aforementioned gear, and means for holding the said gears a reversed position about the aXisiof the acl-z bar.

9. Ina machine of the class described, a

bed, a gelatinized sheet, lying on the said bed, an impression carriage adapted to be moved over the saidbed, a frame for the said impression carriage adapted to carry the said impression roller, and a clamping roller and a bail member of the said frame adapted to move the said clamping roll in relation to the said impression roller, an operating handle hinged to swing in a plane transversely to the movement of the carriage and adapted to move the said clamp- .ing roller.

10. In a machine of the class described, an impression carriage having an operating handle substantially rigid in the direction of the normal travel of said carriage and pivoted for transverse movement, a clamping roll, a stop for controlling the feeding of sheets, having a plurality of parallel fingers, a suitable guide for said fingers, and means for operatively connecting said handle to said clamping roll and stop.

11. In a device of the class described, a movable carriage, an impression roll revolubly mounted in said carriage, a regis- 'tering paper stop, means for moving said stop into contact with said impression roll and clamping means located above said stop adapted for pressing a sheet of paper against said impression roll.

12. In a device of the class described, a movable carriage having mounted thereon a revoluble impression roll, a registering stop for sheets of paper, means for moving said stop into contact with said impression roll means for suddenly retracting said stop, and clamping means located above said stop for pressing a sheet of paper against 13. In a machine of the class described, the combination with an impression roller normally rolling in contact with a gelatin surface, of a stop lying in the path of travel of said impression roller and mounted to be moved into contact therewith for registering sheets of paper, and a clamping roller mounted to be moved with respect to said impression roller. and in all positions lying above said stop, said clamping roller and stop co-acting to insure the registration of paper in a given position above and free from contact with the gelatinized surface,

the travel of the impression rollerover the gelatinized surface pressing a sheet of paper into contact with said surface.

14-. In a machine of the class described, a bed, a gelatin pad sheet trained over the bed, an impression carriage adapted to be moved over the bed, an impression roller carried by the carriage and adapted to impress paper on the gelatin pad sheet on the bed, a rack on one side of said bed adapted to berotated on trunnions, bearings for said impression carriage sliding on said rack, a

gear carried in the carriage and engaging said rack and also engaging a gear mounted on the shaft of said impression roller, a secondary rack mounted on the opposite side of the machine and fixed thereto, a gear mounted on said impression roller for engagement with the secondary rack, said carriage being adapted for partial rotation about said trunnions as an axis.

15; In a machine of the class described, an'impression bed, an impression carriage adapted to be rolled over said bed, an impression roller carried by the carriage, a clamping roller mounted in front of the impression roller and adapted to be swung to and from said impression roller in clamping paper thereto, a bar extending across underneath the clamping roller and serving as a guide for stop fingers, stop fingers supported by said bar and means for moving the stop fingers to and from contact with said impression roller for registering sheets of paper.

16. In a machine of the class described, an impression bed, an impression carriage adapted to travel over the bed and be made to keep in accurate alignment by suitable racks and gears, a clamping roller located in front, of said impression roller adapted for clamping paper to the impression roller, a paper stop located underneath the clamping roller and in forward position thereof and Erin: a machine: of the class; described, an impression bed, an impression carriage adapted to be: moved over the bed, an hm pression roller carried. by the carriage, a1

clamping roller for clamping. paper against the. impression roller, paper stop lingers, a bar supported underneath the clamping roller having guideways for the paper stop fingers, cam. means for'moving'the stop fin-- gers into contact with the impression roller theretowhen the impression roll is in contact with the impression bed.

19. In a maohine of theolass'deseribed, an impression bed, an impression carriage adapted to be moved over the bed, an impression roller carried by the carriage and normally in contact with the impression bed, means for registering a sheet of paper to the mom 1'2- impression roller and means for clamping the paper thereto Whenisaid; impression roller is in contact with the impression bed, and

means for positively drivingtheimpressionroller as it is rolled over the bed.

20. In; a maehineof the elassdesoribed, an

impression-i bed, an impression carriage mounted to travel over' the bed, mnimpres- S1011 roller carried by the carriage and adapted to be swung clear of the bed for the admission ot a fresh gelatin sheet,rmeans tor' registering, a sheet of paper in. relation to the impression roller using ethc' impressionroller as a, part at a paper stop, means for clamping the paper to the impression roller when an end: of the paper iszheld: out ofcontact with: the impression bed, the paper and.

impression surface being, in: content: only as the impression roller" is revolved viirom the initial position of registration downwardly into contact with the bed;

Signed at Chicago, in the: county of: Cook and? State of Illinois; this 24th day of March, 1925.

WILLIAM ERAsrI-Js WILLIAMS; 

